the size of the lens opening though which light passes. also know as f-stop
refers to the process of adding primary colors (of the given color system) together to produce secondary colors. RGB
a mode of automatic exposure in which the photographer selects the aperture and the camera sets the shutter speed that will produce the correct exposure
Number of bits for each pixel in an image. The higher the bit depth, the greater number of colors there are.
to make several exposures, some greater and some less than the exposer that is calculated to be correct
increasing the light to an area to make it darker.
the four colors used in printing with most digital printers: cyan, yellow, magenta and black
a film's or a sensor's response to the colors of a scene
a numerical description of the color of light measured in degrees Kelvin (K)
Contrast in photography is the difference between dark and light. It also refers to contrasts created with colour, tones and texture.
depth of feild
the area between the nearest and farthest point from the camera that are acceptability sharp in an image
a camera - raw format that is open source, which means that any camera or software can use it in their product
blocking light makes that area of the print lighter
dots per inch
the difference between the lightest and darkest values in a scene or image
a tube containing a gas that produces a brief, brilliant flash light when electrified. Also called strobe.
an instrument that measures the amount of light falling on a subject (incident light meter) or the amount of light emitted or reflected by a subject (reflected-light meter) allowing aperture ans shutter speed settings to be computed. Commonly called a light meter.
a combination of apertures and shutter speeds that will produce the same exposure
describes 1. a film, sensor or paper that is very sensitive to light 2. a lens that opens to a very wide aperture 3, a short shutter speed
the common term for the aperture setting of a lens
a card that reflects a known percentage of the light falling on it, usually 18%
a number used to calculate the aperture that correctly exposes the sensor at a given ISO (typically 100) to find the aperture setting, divide the guide number by the distance
a graph that shows the distribution in a digital image of tones
a bracket on the top of a camera that attaches a flash unit and provides for communication between the camera and flash
the physical size of a photograph
incident light meter
a exposure meter that measures the amount of light falling on the subject
the band of invisible rays just beyond red, Some photographic materials are sensitized to record infraed
a numerical rating that describes the sensitivity to light of film or of a digital camera's sensor. The ISO rating doubles as the sensitivity to light doubles
a file formate that compresses photos by discarding pixels determined to be unnecessary. It is considered a lossy formate
the amount of over or underexposure possible without significant loss of quality of an image
to increase the size of a lins aperture
to give more than normal exposure to film, sensor or paper
the setting on a lens that allows the most light to be admitted. typically anywhere from f1.4 to f4
the setting on a lens that allows the least amount of light to be admitted. typically, anywhere between f16 to f32
to follow the motion of a moving object with the camera
short for picture element
a filter that reduces the reflection from nonmetallic surfaces by blocking light waves that are vibrating at selected angles to the filter. enhances blues.
basic colors from which all other colors can be mixed
a single focal length lens
adobe's proprietary format for photoshop documents
a digital camera photograph in exactly the form it was captured by the camera
reflected - light meter
an exposure meter that measure the amount of light reflected or emitted by the subject
a mechanism that opens and closes to admit light into a camera for a measured length of time. the two most common are focal plane shutters (found in 35mm cameras) and lead shutters
a mode of automatic exposure in which the photographer selects the shutter speed and the camera sets the aperture that will produce the correct exposure
shutter sync speed
the highest shutter speed in a SLR camera at which the opening curtain has fully opened, allowing a proper flash exposure on the sensore. sometimes called x sync.
Single lens reflex. A camera in which the image is formed by the taking lens is reflected by a mirror onto a ground glass screen for viewing. the mirror swing out of the way just before exposure to let the image reach the film or sensor
to decrease the size of a lens opening
a way to produce colors by mixing dyes of the three subtractive primaries - cyan, magenta and yellow
an electrical cord connecting a flash unit with a camera so that the two can be synchronized.
the part of the spectrum just beyond violet. Ultraviolet light is invisible to the human eye but strongly affects photographic materials
this format is the universal format for high - quality photographs and can be opened most programs that work with photographs. it is considered a lossless format.
to give less than normal exposure to film, sensore or paper.
a lens setting where the lens is set at it's maximum aperture
batteries, ISO, Shutter (firsts things to check before you take photos)